It is largely because of a brainwashed public who feel they is not enough momentum behind other parties and so vote accordingly. However, recent political events may soon change this as more and more people see the Republicans and Democrats as being very similar. The Tea Party is a very powerful third party that may put forward candidates who can win nationally in the coming elections.
Third parties have difficulty mainly because of the mind set of the general public but also because many third parties have odd and unusual beliefs that do not fit the main stream of most Americans. In the past, the Republican and Democratic and even Independent parties have been good at representing what the people believe.
A third party is a political party that is large enough to have their candidate pull in at least 5 percent of the popular vote. It is so hard for 3rd parties to be successful in the U.S. because they rarely get enough votes to win an election.
The most important roles of minor political parties has been to give the voters and option outside of the 2 major parties. Minor political parties have altered the outcome of some of elections.
The greenback
Minor parties, or third parties as they are usually called, are candidate based parties like the George Wallace's American Independence party. They are usually organized around an ideology.
none
Birthday parties
Splinter party Faction Dissenting clique
TRUE
minor, or third, parties appear from time to time. although no third-party candidate has ever been elected president, minor parties do affect election outcomes. they take votes from major parties and they call attention to certain issues.
Single issued parties is the oldest
Economic protest parties
The president is a member of the Democratic Party, and has been since he entered politics. He has friends and colleagues who are members of other parties or who have very different political views from his, but he seems to have always been a Democrat.
the have been around as long as 10 centuries